Pen-filling mechanism



Patented Nov. 16, 1926.

UNITED STATES A1,601,048 PATENTI OFFICE..

EDWARD BERGQUIST, 0F NEW YORK., N. Y.

' PEN-EILLING MECHANISM.

Application mea my 1s, 1925. serial No. 44,437.

. tainer.

These flexible tubes have ordinarily been inserted in the barrel in a holding clip and the rubber bag or fount has usually been folded back upon itself at one end where 1t is held by the clip.

The bag is ordinarily compressed by a lever arrangementwhich impinges upon the clip and thus serves to collapse the bag or fount or permit it to expand under its own resilience.

Pens of this type are somewhat limited inl their ink capacity, part of the normal capacity of the bag being lost bythe folding thereof.

Furthermore, the folded -bag soon cracks and is destroyed by the lever, and clip action which compresses it to exhaust the "charge, so that it may fill.

The invention herein defined contemplates overcoming the objections above named and has, as its objects, production of a device in which a maximum charge of ink may be drawn into the fount; obviating all cracking and distortion of the fount; protection of the fount against'accidental operation and other features which will hereinafter be described.

Referring to the drawings:

Fig. 1, is a view of the pen with the cap broken-away in section.

Fig. 2, is a view in section through the pen showingjthetelesc'opic tubes partially withdrawn. y

Fig. 3, shows the tubes closed.

Fig. 4, is a view of the upper end of the inner tube 7.

F ig. 5, is a fragmentary view of .said tube.

'It is a well known fact that rubber, such as used in bags of fountain pens, or for any purpose in fact, if held under continued compression, very quickly loses its life and rrsilience. In the rubber bag pens, commonly employed, such a condition exists inasmuch as the end of the bag is turned back upon itself and pressed into the. U-shaped clip which acts in conjunction with a lever fol-'holding the bag and compressing it.

A casual examination of the drawings i1- lustrated in the present'invention, shows the immediate difference -in structural form which obviates the objection above mentioned.

The fount or rubber bag, while always active, is never under compression in the same sense as are the bags of pens commonly upon the market, which use a lever for deflating the bag or fount and employ a clip for holding the bag.

In carrying out the invention, I employ i the usual type of barrel l, and screw threaded cap 2. One end of the barrel 1 is interiorly threaded as at 3, to receive the head or tip 4, whichbears the pen point 5, and the usual feed which is not specifically illustrated.

The tipV 4, has a reduced cylindrical portion 6, to which is secured a tube 7 and ,itv

has a further reduced cylindrical portion 8, to which is secured a flexible or rubber bag 9, which forms the ink fount There is, of course, a duct 10, leading through the tip to the feed and pen point, so that ink from the fount 9, may be fed to the pen point.

Closely surrounding, and fitting the tube 7, there is a telescopic tubell, which at its upper end, has an opening with a valvel seat 12, which is controlled by a valve 13. lThe valve 13, has an extension 14, projecting within the tube l1, and a guide extension 15, extending into an opening 16, in the cap 17.

A light spring 18, normally holds thc valve 13, to its seat 12. There is an air vent as at 19, above the valve seat 12, and the valve controls the passage of air into and out of the cylindrical tube 11.`

The upper end of the inner tube 7, has openings therein 20, these being formed by cutting awayfa portion ofthe end of the turned up tube, leaving'a central portion 21, which will impinge against the valve exi tension 14, to raise the valve when the tube 11, is forced down to its lowermost position With reference to the tube 7 The tube 7 serves as a binder for holding the ink fount or bag 9, in place upon thereduced end of the tip.

It will be observed that the fount or bag 9, may be of any desired length and dimension to suit the size of casing employed and that its entire interior capacity is avallable for an ink supply. v The long Contact between the lnner tube 7, and outer tube 11, makes what is essentially an air tight piston joint, thus making a charge of air'in the tube 11, available for compression, and compressing the fount or bag 9.

The operation of the device is quite apparent, assuming that the fount is empty with the outer tube at its ulppermost position, and the tube immersed 1n ink.

A depression of the outer tube over the inner tube 7, with the air valve 12, closed, will completely collapse the fount or bag 9, expelling all ink or air therefrom.

This action is due to the compression of the air in the space between the inner and outer tubes 7, and 11.

As soon as the outer tube has been forced down to bring the valve extension 14, into contact with the endl 21, of the inner tube, the air valve is raised and the air pressure is released and atmospheric pressure drives the irl: up into the now expanding fount or bag` 9, until it is completely fi led.

igure 2,'shows the outer tube partially compressed although the bag, for convenience, is shown in normal extended position.

Figure 3, shows the outer tube at the limit gf] is movement with the bag completely It is to be noted that the bag or fount` `9, is completely out of contact with the tubular parts and i's never compressed at one point more than another, by any lever or any clip. It stands upright for its entire length in its enclosing casing 7, and is collapsed wholly by the air pressure developed through operation of the telescoping tubes.

Attention is called to the position of the air valve 12, when the fountl has been filledand the pen closed, ready for use. In

this position, thereis still an air vent which gives an atmospheric pressure about the bag, or fount and thus permits perfect feeding3 of ink to the point.

y preference, the barrel is counter bored asi at 22, thus providing an insulating air chamber intermediate the fount and ex-k terior of the barrel. There is an advantage in this, in that warmth of the hand or body is not transmitted to the fount to such an extent as to cause expansion and fiooding of the ink. v

Obviously, the elementary structure might be varied to a considerable extent without departing from the spirit or intent of the invention, and the exact type of valve illustrated, might be varied to suit the exigencies of any articular requirement, it being the main obJect of thev invention to collapse and expand the exible fount through differential fluid pressures. As illustrated and described, the device is entirely without packings or piston pack- Leonesa `What I claim as my invention and desire' to secure by Letters Patent is:

1. A fountain pen having a barrel, pen point and connections thereto, a collapsible vink fount operatively arranged with reference thereto, and valve controlled pneumatic means for collapsing the fount 2. A fountain pen having a barrel, pen point, collapsible ink fount and a duct connecting the fount and pen point, pneumatic means for collapsing the ink fount and a pneumatic valve for releasing the pressures of the pneumatic collapsing means.

3. A pen filling mechanism consisting of a pair of telescopic tubes, a collapsible fount within said tubes and a valve for controlling the fluid pressures of the telescoping tubes. l

4. A pen filling mechanism consisting of a pair of telescopic tubes, a collapsible fount within said tubes and a valve for controlling the iuid pressures of the telescopic tubes and the action of said pressure upon the collapsible ink fount 5. A pen filling mechanism, a collapsible tube, means for creating a iuid pressure on the exterior of said tube whereby it may be collapsed and valve controlled means for releasingsaid fluid pressure to permit expansion of the collapsible tube.

6. A pen filling mechanism comprising a collapsible tube, a housing therefor, a telescopic .member closely fitting said housing and an Aatmospheric valve controlling the pressures between the telescopic members.

7. A pen filling mechanism. a collapsible tube, a housing therefor, a telescopic member movable with reference to the housing, a valve at one end of said telescopic member, and means appurtenant to the valve and telescopic mem ers for opening said valve at pre-determined positions of-the telescopic member.

8. A pen filling mechanism, a collapsible fount, a housing therefor, a member tel' escoping on the housing, an atmospheric valve opening in said member, a valve controlling said opening, means for opening said valve upon pre-determined movement of said member and means for automatically' closing said valve. l

' EDWARD BERGQUIST. 

